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Compile problem with interface initialization
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created by <a href="https://community.jboss.org/people/pulce">Enrico Palazzo</a> in <i>Javassist</i> - <a href="https://community.jboss.org/message/749098#749098">View the full discussion</a>
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<div class="jive-rendered-content"><p><span>Hi there! I implemented code to my project that makes use of javassist. However, I constantly fail to implement an interface to a new class I create. Here is the code I use (adapted from </span><a class="jive-link-external-small" href="http://www.javaranch.com/journal/200711/Journal200711.jsp#a4):" target="_blank">http://www.javaranch.com/journal/200711/Journal200711.jsp#a4):</a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>Main file:</strong></p><p><span style="font-family: terminal,monaco;">package test;</span></p><p><span style="font-family: terminal,monaco;">import javassist.*;</span></p><p><span style="font-family: terminal,monaco;">public class Example2 {</span></p><p><span style="font-family: terminal,monaco;">     public static void main (String[] args) throws Exception {</span></p><p><span style="font-family: terminal,monaco;">        ClassPool pool = ClassPool.getDefault();</span></p><p><span style="font-family: terminal,monaco;">        CtClass evalClass = pool.makeClass("Eval"+System.currentTimeMillis());</span></p><p><span style="font-family: terminal,monaco;">       evalClass.setInterfaces(new CtClass[] { pool.makeClass("Evaluator") });</span></p><p><span style="font-family: terminal,monaco;">       evalClass.addMethod(CtNewMethod.make("public double eval (double x) { return (x*x-x) ; }", evalClass));</span></p><p><span style="font-family: terminal,monaco;">       Class clazz = evalClass.toClass();</span></p><p><span style="font-family: terminal,monaco;">       Evaluator obj  = (Evaluator) clazz.newInstance();</span></p><p><span style="font-family: terminal,monaco;">       double result = obj.eval(4);</span></p><p><span style="font-family: terminal,monaco;">       System.out.println(result);</span></p><p><span style="font-family: terminal,monaco;">    }</span></p><p><span style="font-family: terminal,monaco;">}</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>Interface "Evaluator":</strong></p><p><span style="font-family: terminal,monaco;">package test;</span></p><p><span style="font-family: terminal,monaco;">public interface Evaluator {</span></p><p><span style="font-family: terminal,monaco;">     public double eval (double x);</span></p><p><span style="font-family: terminal,monaco;"> }</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> The code works like a charm in the default package of an Eclipse project (without package test; of course). However, when I use it in a package, I get an Error:</p><p><span class="postbody">javassist.CannotCompileException:</span> by java.lang.NoClassDefFoundError: Ev<span class="postbody">aluator </span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>From trial and interpreting different error messages I guess that the class loader that should load "Evaluator" refers to the /bin path, while the Evaluator.class file is to be found in the /bin/test folder. Is there a way to solve that? Many thanks in advance!</p></div>
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